I remember finding the "2000-2100 AD" book in a library when I was younger. I too was fascinated by the paintings and ship designs. One aspect I thought was pretty sensible (for future tech) was that some of the ships didn't have windows. Cameras, video monitors, and targeting and navigation computers would make up for it.
A couple years ago I was in a RPG game shop in Chicago. Among all the books and tabletop models, I found an updated copy of the same book. All the information appeared to be the same, except all the ship images were redone with computer graphics.
I still like the look of the "old school" sci-fi paintings though.